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XTEATest_C_style.ino
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/**
* \file XTEATest_C_style.ino
* \brief XTEA cipher library testing program (C style).
*
* \copyright SPDX-FileCopyrightText: Copyright 2020-2021 Michal Protasowicki
*
* \license SPDX-License-Identifier: MIT
*
*/
#include "Arduino.h"
#include "xtea.h"
#if defined(__AVR_ATmega4808__)
#define Serial Serial1
#endif
void setup()
{
Serial.begin(115200);
Serial.println("Start tests... ('C' style)");
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH);
uint8_t key[XTEA_KEY_SIZE] {0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F};
uint8_t iv[XTEA_IV_SIZE] {0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17};
uint8_t data[] {0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F};
#if XTEA_ROUNDS == 48
uint8_t encrEcb[] {0x6C, 0xDE, 0x41, 0xA5, 0x51, 0xC1, 0xFA, 0x90, 0xFC, 0xF3, 0x69, 0x9D, 0x2D, 0x49, 0x64, 0x79,
0x48, 0xDE, 0x31, 0xAC, 0x3C, 0xBA, 0xE4, 0x41, 0x26, 0x02, 0xC2, 0xF6, 0xA9, 0xCA, 0x11, 0x07,
0x5C, 0xF2, 0xC4, 0xAA, 0xB3, 0xEA, 0x6C, 0xD7, 0x84, 0xAF, 0xDF, 0xBA, 0x1E, 0x61, 0xBA, 0x68,
0xE4, 0xB8, 0xCA, 0xC7, 0xD9, 0xF7, 0x08, 0x1A, 0x46, 0xBD, 0x0A, 0x37, 0x86, 0xD7, 0xF1, 0x45};
uint8_t encrCfb[] {0x74, 0xB1, 0x75, 0x6B, 0xBF, 0x26, 0xA3, 0x3F, 0x87, 0x0C, 0x21, 0x98, 0x71, 0x9F, 0x5D, 0x20,
0xAB, 0x6F, 0x70, 0xF9, 0x41, 0x46, 0x1D, 0x0B, 0x9B, 0x36, 0x0E, 0x29, 0xCD, 0x3E, 0xAF, 0x7B,
0xE6, 0xAD, 0x40, 0x22, 0xA0, 0xA3, 0xF7, 0x93, 0x84, 0x60, 0x05, 0xD3, 0x4A, 0xEE, 0xAF, 0x01,
0x3E, 0xD4, 0x08, 0x09, 0x32, 0x0D, 0xFE, 0xF3, 0xC1, 0x93, 0x45, 0x00, 0x0A, 0x7A, 0xB9, 0x27};
uint8_t encrOfb[] {0x74, 0xB1, 0x75, 0x6B, 0xBF, 0x26, 0xA3, 0x3F, 0x0A, 0x4E, 0x4F, 0xFF, 0x6B, 0xD3, 0xEA, 0x1E,
0x32, 0x0C, 0x9E, 0x7C, 0xCA, 0x9C, 0xAE, 0x28, 0xBB, 0x14, 0x87, 0xFF, 0xCA, 0xAE, 0x39, 0xF9,
0x3E, 0x56, 0x13, 0x34, 0x19, 0xD9, 0x8E, 0xD3, 0x49, 0x03, 0x5B, 0xF9, 0x0E, 0x4C, 0xE3, 0x94,
0x0E, 0x8D, 0xF0, 0xE3, 0x06, 0xBB, 0x2B, 0x5C, 0x59, 0x1A, 0xDE, 0x5B, 0x51, 0xA5, 0x7C, 0xB5};
#elif XTEA_ROUNDS == 32
uint8_t encrEcb[] {0x0E, 0xA2, 0x4F, 0x26, 0xCD, 0xDD, 0x01, 0x75, 0x4D, 0x3C, 0x3A, 0xCD, 0xC8, 0x01, 0x45, 0x77,
0x41, 0x0A, 0x49, 0xB8, 0xAD, 0xA5, 0x90, 0x0A, 0xD5, 0x83, 0xA5, 0xD7, 0xC0, 0xF0, 0x33, 0xA0,
0x09, 0xC5, 0xA5, 0xC3, 0x5D, 0x63, 0x76, 0xDC, 0x3C, 0x39, 0xCE, 0x44, 0xFF, 0x57, 0x45, 0x4C,
0xD2, 0xD8, 0x5A, 0x95, 0x03, 0x8C, 0x3B, 0x89, 0xCE, 0x59, 0xB7, 0x7C, 0x00, 0x2F, 0x6D, 0x80};
uint8_t encrCfb[] {0xEA, 0x1A, 0x8B, 0xF2, 0xD1, 0x8D, 0xBF, 0xBC, 0xA6, 0x83, 0x9E, 0xAF, 0x92, 0x3C, 0x0B, 0x2A,
0x20, 0xA3, 0x21, 0xC1, 0x85, 0x8F, 0xA0, 0xE6, 0x03, 0x72, 0x4D, 0xD6, 0x5C, 0xB2, 0x1C, 0x2A,
0xEE, 0x9D, 0x42, 0x07, 0xED, 0x1C, 0x31, 0xE3, 0x43, 0x41, 0x77, 0xB7, 0xA2, 0x5B, 0xA6, 0xEB,
0xED, 0xB7, 0x04, 0xC9, 0xBB, 0x15, 0xEC, 0xE3, 0xDB, 0x67, 0xDE, 0x0F, 0xA8, 0xC5, 0x09, 0xB4};
uint8_t encrOfb[] {0xEA, 0x1A, 0x8B, 0xF2, 0xD1, 0x8D, 0xBF, 0xBC, 0x99, 0xC6, 0x96, 0xB8, 0x05, 0x93, 0xBD, 0xDB,
0xA5, 0xDA, 0x81, 0xFB, 0x2A, 0x50, 0x35, 0x77, 0xCB, 0x28, 0xD4, 0x3F, 0x78, 0x71, 0xE9, 0x07,
0x08, 0x79, 0xEF, 0x9F, 0xB0, 0x22, 0x5E, 0xA3, 0x9F, 0xB1, 0x6D, 0xB0, 0x2E, 0x4D, 0x75, 0x49,
0x8F, 0x93, 0x26, 0x7E, 0x58, 0x16, 0x42, 0x45, 0xB7, 0x05, 0x56, 0x27, 0xE3, 0xA7, 0xAD, 0x0F};
#elif XTEA_ROUNDS == 24
uint8_t encrEcb[] {0xC2, 0x5E, 0x11, 0x24, 0xCE, 0x27, 0x92, 0x07, 0xDD, 0x2A, 0x4D, 0x69, 0xD0, 0x45, 0xA2, 0xF8,
0x9B, 0x82, 0x64, 0xC5, 0x88, 0x50, 0x40, 0x07, 0xC0, 0xCD, 0x97, 0x41, 0x6A, 0xD7, 0x3F, 0xC5,
0x72, 0x95, 0xBB, 0xF4, 0xDB, 0xCE, 0x6B, 0x9B, 0xD9, 0x93, 0x7F, 0x75, 0x4B, 0x33, 0x5F, 0xFB,
0x20, 0x06, 0x89, 0xC6, 0xC8, 0xE8, 0x6C, 0xFF, 0x85, 0x08, 0xCD, 0x13, 0x36, 0x93, 0x1E, 0xC1};
uint8_t encrCfb[] {0xB1, 0x2D, 0x1C, 0x4B, 0x16, 0x89, 0x41, 0xBD, 0x6E, 0x87, 0xBF, 0xCF, 0x5F, 0x71, 0x5E, 0x86,
0x1C, 0x7A, 0x8B, 0x18, 0xFD, 0x3E, 0x03, 0x28, 0x60, 0x2B, 0x27, 0xFF, 0x2D, 0xE2, 0x47, 0xFC,
0x25, 0x29, 0xE0, 0x98, 0xB3, 0x71, 0x53, 0x2B, 0xF5, 0x03, 0x9A, 0x3A, 0x24, 0x90, 0xD1, 0x83,
0xA8, 0xD5, 0x5D, 0xE4, 0xA8, 0x47, 0x9C, 0xE1, 0xD3, 0x1B, 0x9F, 0x4D, 0x4E, 0xD6, 0xD3, 0xB2};
uint8_t encrOfb[] {0xB1, 0x2D, 0x1C, 0x4B, 0x16, 0x89, 0x41, 0xBD, 0x73, 0x7B, 0xC6, 0x31, 0xCA, 0xF5, 0x99, 0x08,
0x3C, 0x6D, 0xBD, 0x76, 0x30, 0x39, 0x9B, 0xF7, 0xD2, 0xFA, 0x13, 0xAA, 0x6F, 0x7B, 0xFF, 0x4B,
0xC8, 0x02, 0x75, 0x1D, 0xDB, 0x09, 0xE0, 0x74, 0xCD, 0x85, 0x04, 0x8E, 0x7F, 0x5F, 0xA3, 0x18,
0xD5, 0x9F, 0x69, 0xA0, 0xE6, 0xCC, 0x57, 0xCE, 0x31, 0x7A, 0x6C, 0x92, 0x67, 0x91, 0x88, 0xDD};
#else
uint8_t encrEcb[sizeof(data)] {0x00};
uint8_t encrCfb[sizeof(data)] {0x00};
uint8_t encrOfb[sizeof(data)] {0x00};
#endif
uint8_t encrData[] {0xEA, 0x1A, 0x8B, 0xF2, 0xD1, 0x8D, 0xBF, 0xBC, 0xA6, 0x83, 0x9E, 0xAF, 0x92, 0x3C, 0x0B, 0x2A,
0x20, 0xA3, 0x21, 0xC1, 0x85, 0x8F, 0xA0, 0xE6, 0x03, 0x72, 0x4D, 0xD6, 0x5C, 0xB2, 0x1C, 0x2A,
0xEE, 0x9D, 0x42, 0x07, 0xED, 0x1C, 0x31, 0xE3, 0x43, 0x41, 0x77, 0xB7, 0xA2, 0x5B, 0xA6, 0xEB,
0xED, 0xB7, 0x04, 0xC9, 0xBB, 0x15, 0xEC, 0xE3, 0xDB, 0x67, 0xDE, 0x0F, 0xA8, 0xC5, 0x09, 0xB4};
#if XTEA_MAC_ROUNDS == 32
uint8_t mac7Bytes[] {0x7D, 0x8F, 0xE6, 0xDD, 0x6C, 0x27, 0x80, 0x36};
uint8_t macAllBytes[] {0x47, 0x0C, 0xD1, 0x9F, 0x44, 0x2D, 0xFC, 0xD9};
uint8_t macAADCiph[] {0x72, 0x0D, 0x46, 0xB4, 0xD4, 0x51, 0xA8, 0xAD};
#elif XTEA_MAC_ROUNDS == 24
uint8_t mac7Bytes[] {0xAA, 0xA0, 0x81, 0xB0, 0xEB, 0xC2, 0x0E, 0x43};
uint8_t macAllBytes[] {0x36, 0x38, 0xA7, 0xF5, 0xED, 0xD3, 0x73, 0x6A};
uint8_t macAADCiph[] {0x3E, 0x5C, 0x43, 0xC0, 0x12, 0xE9, 0x12, 0x08};
#elif XTEA_MAC_ROUNDS == 20
uint8_t mac7Bytes[] {0x7D, 0x18, 0xA1, 0x45, 0x16, 0x15, 0xB3, 0x60};
uint8_t macAllBytes[] {0x2D, 0xFA, 0x79, 0x7B, 0x17, 0x59, 0xFF, 0x5F};
uint8_t macAADCiph[] {0x29, 0x6E, 0x6D, 0xC1, 0xC1, 0x5B, 0x26, 0xBB};
#else
uint8_t mac7Bytes[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
uint8_t macAllBytes[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
uint8_t macAADCiph[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
#endif
uint8_t resultBuffer[sizeof(data)];
uint8_t block[XTEA_BLOCK_SIZE] {0};
uint32_t start;
uint32_t time;
uint8_t chunks = sizeof(data) / XTEA_BLOCK_SIZE;
uint8_t shift = 0;
String timeStr = " time [us]: ";
String tiblStr = " time [us]/block: ";
String usStr = ") [us]: ";
String chkStr = "\t Checking data with test vector: ";
String encStr = "Encrypt";
String decStr = "Decrypt";
String pasStr = "PASS";
String faiStr = "FAIL";
String allStr = " ALL loops (n = ";
String cfbMac = "CFB-MAC";
String resultStr;
//----------------------------------------------------
Serial.println("XTEA_ROUNDS = " + String(XTEA_ROUNDS) + " XTEA_MAC_ROUNDS = " + String(XTEA_MAC_ROUNDS));
Serial.println("ECB:");
xteaEcbCtx_t ctxEcb;
xteaInitEcb(&ctxEcb, key, XTEA_ROUNDS); // initialization of the ECB context
start = micros();
shift = 0;
for (uint8_t i = 0; i < chunks; i++) // encryption in ECB mode
{
memcpy(block, data + shift, XTEA_BLOCK_SIZE); // copying data block into buffer
xteaEcbBlock(&ctxEcb, block); // data block encryption
memcpy(resultBuffer + shift, block, XTEA_BLOCK_SIZE); // copying encrypted data
shift += XTEA_BLOCK_SIZE;
}
time = micros() - start;
// compare the contents of buffer after encryption with reference data and print results
Serial.print(encStr + tiblStr + String(time / chunks));
resultStr = (0 == memcmp(resultBuffer, encrEcb, sizeof(encrEcb))) ? pasStr : faiStr;
Serial.println(chkStr + resultStr);
start = micros();
shift = 0;
xteaSetOperation(&ctxEcb, xteaDecrypt); // setting the decryption operation
for (uint8_t i = 0; i < chunks; i++) // decryption in ECB mode
{
memcpy(block, resultBuffer + shift, XTEA_BLOCK_SIZE); // copying data block into buffer
xteaEcbBlock(&ctxEcb, block); // data block decryption
memcpy(resultBuffer + shift, block, XTEA_BLOCK_SIZE); // copying decrypted data
shift += XTEA_BLOCK_SIZE;
}
time = micros() - start;
// compare the contents of buffer after decryption with reference data and print results
Serial.print(decStr + tiblStr + String(time / chunks));
resultStr = (0 == memcmp(resultBuffer, data, sizeof(data))) ? pasStr : faiStr;
Serial.println(chkStr + resultStr);
Serial.println("");
//----------------------------------------------------
Serial.println("CFB:");
xteaCipherCtx_t ctx;
xteaInit(&ctx, key, iv, XTEA_ROUNDS); // initialization of the Cipher context
start = micros();
shift = 0;
for (uint8_t i = 0; i < chunks; i++) // encryption in CFB mode
{
memcpy(block, data + shift, XTEA_BLOCK_SIZE); // copying data block into buffer
xteaCfbBlock(&ctx, block); // data block encryption
memcpy(resultBuffer + shift, block, XTEA_BLOCK_SIZE); // copying encrypted data
shift += XTEA_BLOCK_SIZE;
}
time = micros() - start;
// compare the contents of buffer after encryption with reference data and print results
Serial.print(encStr + tiblStr + String(time / chunks));
resultStr = (0 == memcmp(resultBuffer, encrCfb, sizeof(encrCfb))) ? pasStr : faiStr;
Serial.println(chkStr + resultStr);
start = micros();
shift = 0;
xteaSetIv(&ctx, iv); // re-initialization of IV vector (cipher operations in this mode constantly modify IV vector)
xteaSetOperation(&ctx.base, xteaDecrypt); // setting the decryption operation
for (uint8_t i = 0; i < chunks; i++) // decryption in CFB mode
{
memcpy(block, resultBuffer + shift, XTEA_BLOCK_SIZE); // copying data block into buffer
xteaCfbBlock(&ctx, block); // data block decryption
memcpy(resultBuffer + shift, block, XTEA_BLOCK_SIZE); // copying decrypted data
shift += XTEA_BLOCK_SIZE;
}
time = micros() - start;
// compare the contents of buffer after decryption with reference data and print results
Serial.print(decStr + tiblStr + String(time / chunks));
resultStr = (0 == memcmp(resultBuffer, data, sizeof(data))) ? pasStr : faiStr;
Serial.println(chkStr + resultStr);
Serial.println("");
//----------------------------------------------------
Serial.println("OFB:");
start = micros();
shift = 0;
xteaSetIv(&ctx, iv); // re-initialization of IV vector (OFB and CFB modes use the same context)
xteaSetOperation(&ctx.base, xteaEncrypt); // setting the encryption operation
for (uint8_t i = 0; i < chunks; i++) // encryption in OFB mode
{
memcpy(block, data + shift, XTEA_BLOCK_SIZE); // copying data block into buffer
xteaOfbBlock(&ctx, block); // data block encryption
memcpy(resultBuffer + shift, block, XTEA_BLOCK_SIZE); // copying encrypted data
shift += XTEA_BLOCK_SIZE;
}
time = micros() - start;
// compare the contents of buffer after encryption with reference data and print results
Serial.print(encStr + tiblStr + String(time / chunks));
resultStr = (0 == memcmp(resultBuffer, encrOfb, sizeof(encrOfb))) ? pasStr : faiStr;
Serial.println(chkStr + resultStr);
start = micros();
shift = 0;
xteaSetIv(&ctx, iv); // re-initialization of IV vector (cipher operations in this mode constantly modify IV vector)
xteaSetOperation(&ctx.base, xteaDecrypt); // setting the decryption operation
for (uint8_t i = 0; i < chunks; i++) // decryption in OFB mode
{
memcpy(block, resultBuffer + shift, XTEA_BLOCK_SIZE); // copying data block into buffer
xteaOfbBlock(&ctx, block); // data block decryption
memcpy(resultBuffer + shift, block, XTEA_BLOCK_SIZE); // copying decrypted data
shift += XTEA_BLOCK_SIZE;
}
time = micros() - start;
// compare the contents of buffer after decryption with reference data and print results
Serial.print(decStr + tiblStr + String(time / chunks));
resultStr = (0 == memcmp(resultBuffer, data, sizeof(data))) ? pasStr : faiStr;
Serial.println(chkStr + resultStr);
Serial.println("");
//----------------------------------------------------
// Function tests for calculating MAC codes.
Serial.println(cfbMac + ":");
xteaCtx_t mCtx;
uint_fast16_t counts = 1000;
start = micros();
for (uint_fast16_t i = 0; i < counts; i++)
{
xteaCfbMacInit(&mCtx, key, XTEA_MAC_ROUNDS); // context initialization for MAC functions
__asm__ volatile(""); // prevents compiler from optimizing loop
}
time = micros() - start;
Serial.println(cfbMac + " init" + timeStr + String(time / counts) + "\t\t\t\t\t" + allStr + String(counts) + usStr + String(time));
start = micros();
for (uint_fast16_t i = 0; i < counts; i++)
{
xteaCfbMacUpdate(&mCtx, data, XTEA_BLOCK_SIZE); // updating MAC code calculations for new data
__asm__ volatile(""); // prevents compiler from optimizing loop
}
time = micros() - start;
Serial.println(cfbMac + " update" + timeStr + String(time / counts) + "\t\t\t\t" + allStr + String(counts) + usStr + String(time));
start = micros();
for (uint_fast16_t i = 0; i < counts; i++)
{
xteaCfbMacFinish(&mCtx); // calculating final MAC code after entering all data
__asm__ volatile(""); // prevents compiler from optimizing loop
}
time = micros() - start;
Serial.println(cfbMac + " finish [worst case]" + timeStr + String(time / counts) + "\t" + allStr + String(counts) + usStr + String(time));
start = micros();
for (uint_fast16_t i = 0; i < counts; i++)
{
xteaCfbMacGet(&mCtx, block); // fetching MAC code from context
__asm__ volatile(""); // prevents compiler from optimizing loop
}
time = micros() - start;
Serial.println(cfbMac + " get MAC" + timeStr + String(time / counts) + "\t\t\t\t" + allStr + String(counts) + usStr + String(time));
start = micros();
for (uint_fast16_t i = 0; i < counts; i++)
{
xteaCfbMacCmp(&mCtx, block); // verification of passed MAC code with the previously calculated
// on the basis of passed data
__asm__ volatile(""); // prevents compiler from optimizing loop
}
time = micros() - start;
Serial.println(cfbMac + " check MAC" + timeStr + String(time / counts) + "\t\t\t\t" + allStr + String(counts) + usStr + String(time));
Serial.println("");
//----------------------------------------------------
// calculating and verifying a MAC code for data in an amount less than one complete data block.
start = micros();
xteaCfbMacInit(&mCtx, key, XTEA_MAC_ROUNDS);
xteaCfbMacUpdate(&mCtx, data, 7);
xteaCfbMacFinish(&mCtx);
xteaCfbMacGet(&mCtx, block);
time = micros() - start;
Serial.print(cfbMac + " (7 bytes data)" + tiblStr + String(time));
resultStr = xteaCfbMacCmp(&mCtx, mac7Bytes) ? pasStr : faiStr;
Serial.println(chkStr + resultStr);
// MAC code calculation and verification for more data
start = micros();
xteaCfbMacInit(&mCtx, key, XTEA_MAC_ROUNDS);
xteaCfbMacUpdate(&mCtx, data, sizeof(data));
xteaCfbMacFinish(&mCtx);
xteaCfbMacGet(&mCtx, block);
time = micros() - start;
Serial.print(cfbMac + " (all bytes data)" + tiblStr + String(time / (chunks + 1)));
resultStr = xteaCfbMacCmp(&mCtx, macAllBytes) ? pasStr : faiStr;
Serial.println(chkStr + resultStr);
//----------------------------------------------------
Serial.print(cfbMac + " code authentication of unencrypted data and cryptogram:");
// MAC code calculation and verification for combined unencrypted and encrypted data.
uint32_t dataSize {toBigEndian(sizeof(iv))}; // Change in endianity so that the data for calculating the MAC code
// is the same on devices having different endianities.
uint8_t * dPtr {(uint8_t *)&dataSize}; // allows access to uint_32_t variable as uint8_t[]
xteaCfbMacInit(&mCtx, key, XTEA_MAC_ROUNDS); // context initialization for MAC function
xteaCfbMacUpdate(&mCtx, dPtr, sizeof(uint32_t)); // MAC code calculation for unencrypted data
xteaCfbMacUpdate(&mCtx, iv, sizeof(iv));
dataSize = toBigEndian(sizeof(encrData)); // continue MAC code calculation for encrypted data
xteaCfbMacUpdate(&mCtx, dPtr, sizeof(uint32_t));
xteaCfbMacUpdate(&mCtx, encrData, sizeof(encrData));
xteaCfbMacFinish(&mCtx); // calculating final MAC code after entering all data
xteaCfbMacGet(&mCtx, block); // fetching MAC code from context
resultStr = xteaCfbMacCmp(&mCtx, macAADCiph) ? pasStr : faiStr; // verification of passed MAC code with the previously calculated
Serial.println(chkStr + resultStr);
Serial.println("End tests.");
}
// the loop function runs over and over again forever
void loop()
{
digitalWrite(LED_BUILTIN, HIGH);
delay(50);
digitalWrite(LED_BUILTIN, LOW);
delay(1950);
}
//----------------------------------------------------
uint32_t toBigEndian(uint32_t x)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return __builtin_bswap32(x);
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
return x;
#else
#error "Unsupported hardware !!!"
#endif
}